Japanese male college athletes (N = 14) were assigned to a creatine supplement or placebo group. Ss supplemented creatine (4 x 5 g creatine plus 2.5 g dextrin) or placebo (4 x 7.5 g dextrin) daily for six days. Testing consisted of five repetitions of 60-m sprinting with five minutes of rest between each repetition. Tests were performed before and after the supplementation period.

The creatine group performed better in the test set after supplementation. Performance deterioration was prevented.